text stringlengths 11 1.65k | source stringlengths 38 44 |
|---|---|
Signorini problem Each system expresses a unilateral constraint, in the sense that they express the physical impossibility of the elastic body to penetrate into the surface where it rests: the ambiguity is not only in the unknown values non-zero quantities must satisfy on the contact set but also in the fact that it is... | https://en.wikipedia.org/wiki?curid=22194510 |
Signorini problem As for the section on the formal statement of the Signorini problem, the contents of this section and the included subsections follow closely the treatment of Gaetano Fichera in , , and also : obviously, the exposition focuses on the basics steps of the proof of the existence and uniqueness for the so... | https://en.wikipedia.org/wiki?curid=22194510 |
Signorini problem Therefore, Fichera tries to minimize the functional in a wider function space: in doing so, he first calculates the first variation (or functional derivative) of the given functional in the neighbourhood of the sought minimizing admissible displacement formula_47, and then requires it to be greater th... | https://en.wikipedia.org/wiki?curid=22194510 |
Chlorinated polycyclic aromatic hydrocarbon Chlorinated polycyclic aromatic hydrocarbons (Cl-PAHs) are a group of compounds comprising polycyclic aromatic hydrocarbons with two or more aromatic rings and one or more chlorine atoms attached to the ring system. Cl-PAHs can be divided into two groups: chloro-substituted P... | https://en.wikipedia.org/wiki?curid=22201177 |
Chlorinated polycyclic aromatic hydrocarbon Cl-PAHs have commonly been detected in tap water, fly ash from an incineration plant for radioactive waste, emissions from coal combustion and municipal waste incineration, automobile exhaust, snow, and urban air. They have also been detected in electronic wastes, workshop-fl... | https://en.wikipedia.org/wiki?curid=22201177 |
Chlorinated polycyclic aromatic hydrocarbon This study also determined through compositional analysis that relatively low molecular weight Cl-PAHs dominated in warmer seasons and high molecular weight Cl-PAHs dominated in colder seasons. Some Cl-PAHs have structural similarities to dioxins, they are suspected of having... | https://en.wikipedia.org/wiki?curid=22201177 |
Chlorinated polycyclic aromatic hydrocarbon Aryl Hydrocarbon Receptor (AhR) is a cytosolic, ligand-activated transcription receptor. Cl-PAHs have the ability to bind to and activate the AhR. The biological pathway involves translocation of the activated AhR to the nucleus. In the nucleus, the AhR binds with the AhR nuc... | https://en.wikipedia.org/wiki?curid=22201177 |
Propellant depot An orbital propellant depot is a cache of propellant that is placed in orbit around Earth or another body to allow spacecraft or the transfer stage of the spacecraft to be fueled in space. It is one of the types of space resource depots that have been proposed for enabling infrastructure-based space ex... | https://en.wikipedia.org/wiki?curid=22202480 |
Propellant depot Since all or a fraction of the transfer stage propellant can be off-loaded, the separately launched spacecraft with payload and/or crew could have a larger mass or use a smaller launch vehicle. With a LEO depot or tanker fill, the size of the launch vehicle can be reduced and the flight rate increased—... | https://en.wikipedia.org/wiki?curid=22202480 |
Propellant depot Non-cryogenic, earth-storable liquid rocket propellants including RP-1 (kerosene), hydrazine and nitrogen tetroxide (NTO), and mildly cryogenic, space-storable propellants like liquid methane and liquid oxygen, can be kept in liquid form with less boiloff than the cryogenic fuels, but also have lower s... | https://en.wikipedia.org/wiki?curid=22202480 |
Propellant depot An active cryogenic depot is a passive depot with additional power and refrigeration equipment/cryocoolers to reduce or eliminate propellant boiloff. Other active cryogenic depot concepts include electrically powered attitude control equipment to conserve fuel for the end payload. In the heavy lift arc... | https://en.wikipedia.org/wiki?curid=22202480 |
Propellant depot In a 2010 NASA study, an additional flight of an Ares V heavy launch vehicle was required to stage a US government Mars reference mission due to 70 tons of boiloff, assuming 0.1% boiloff/day for hydrolox propellant. The study clearly identified the need to decrease the design boiloff rate by an order o... | https://en.wikipedia.org/wiki?curid=22202480 |
Propellant depot In a novel mission architecture, the SpaceX design intends to enable the long-journey spacecraft to expend almost all of its propellant load during the launch to low Earth orbit while it serves as the second stage of the SpaceX Starship, and then after refilling on orbit by multiple Starship tankers, p... | https://en.wikipedia.org/wiki?curid=22202480 |
Propellant depot If used in conjunction with a mining facility on the moon, water or propellant could be exported back to the depot, further reducing the cost of propellant. An exploration program based on a depot architecture could be cheaper and more capable, not needing a specific rocket or a heavy lift such as the ... | https://en.wikipedia.org/wiki?curid=22202480 |
Propellant depot Named CRYOTE, or CRYogenic Orbital TEstbed, it will be a testbed for demonstrating a number of technologies needed for cryogenic propellant depots, with several small-scale demonstrations planned for 2012-2014. , ULA says this mission could launch as soon as 2012 if funded. The ULA CRYOTE small-scale d... | https://en.wikipedia.org/wiki?curid=22202480 |
Propellant depot "Simple Depot" would utilize the "used" (nearly-emptied) Centaur upper stage LH2 tank for long-term storage of LO2 while LH2 will be stored in the Simple Depot LH2 module, which is launched with only ambient-temperature gaseous Helium in it. The SD LH2 tank was to be diameter and long, in volume, and s... | https://en.wikipedia.org/wiki?curid=22202480 |
Propellant depot As part of the Depot-Based Space Transportation Architecture, ULA has proposed the Advanced Common Evolved Stage (ACES) upper stage rocket. ACES hardware is designed from the start as an in-space propellant depot that could be used as way-stations for other rockets to stop and refuel on the way to beyo... | https://en.wikipedia.org/wiki?curid=22202480 |
Propellant depot Transfer of liquid propellants in microgravity is complicated by the uncertain distribution of liquid and gasses within a tank. Propellant settling at an in-space depot is thus more challenging than in even a slight gravity field. ULA plans to use the DMSP-18 mission to flight-test centrifugal propella... | https://en.wikipedia.org/wiki?curid=22202480 |
Propellant depot Since space agencies like NASA hope to be purchasers rather than owners, possible operators include the aerospace company that constructed the depot, manufacturers of the rockets, a specialist space depot company, or an oil/chemical company that refines the propellant. By using several tanker rockets t... | https://en.wikipedia.org/wiki?curid=22202480 |
Propellant depot The proposed Simple Depot cryogenic PTSD mission utilizes "remote berthing arm and docking and fluid transfer ports" both for propellant transfer to other vehicles, as well as for refilling the depot up to the full 30 tonne propellant capacity. S.T. Demetriades proposed a method for refilling by collec... | https://en.wikipedia.org/wiki?curid=22202480 |
Propellant depot On the other hand, depots are typically proposed for exploration missions, where the change over time of the depot's orbit can be chosen to align with the departure vector. This allows one well-aligned departure time minimizing fuel use that requires a very precisely-timed departure. Less efficient dep... | https://en.wikipedia.org/wiki?curid=22202480 |
Propellant depot More specifically, the 3-burn departure strategy has been shown to enable a single LEO depot in an ISS-inclination orbit (51 degrees) to dispatch nine spacecraft to "nine different interplanetary targets [where the depot need not] perform any phasing maneuvers to align with any of the departure asympto... | https://en.wikipedia.org/wiki?curid=22202480 |
Propellant depot It is possible to achieve zero boil-off (ZBO) with cryogenic propellant storage using an active thermal control system. Tests conducted at the NASA Lewis Research Center's Supplemental Multilayer Insulation Research Facility (SMIRF) over the summer of 1998 demonstrated that a hybrid thermal control sys... | https://en.wikipedia.org/wiki?curid=22202480 |
Propellant depot Cryogenic xenon saves mass over passive storage almost immediately. When power to run the ZBO is already available, the break-even mission durations are even shorter, e.g. about a month for hydrogen. The larger the tank, the fewer days in LEO when ZBO has reduced mass. In addition to technical solution... | https://en.wikipedia.org/wiki?curid=22202480 |
Propellant depot The resulting leaks makes storing cryogenic propellants in zero gravity conditions difficult. In the early 2010s, several in-space refueling projects got under-way. Two private initiatives and a government-sponsored test mission were in some level of development or testing . The NASA Robotic Refueling ... | https://en.wikipedia.org/wiki?curid=22202480 |
Propellant depot "The business model, which is still evolving, could ask customers to pay per kilogram of fuel successfully added to their satellite, with the per-kilogram price being a function of the additional revenue the operator can expect to generate from the spacecraft’s extended operational life." The plan is t... | https://en.wikipedia.org/wiki?curid=22202480 |
Propellant depot It is possible to bring additional propellant to a space asset, and utilize the propellant for attitude control or orbital velocity change, without ever transferring the propellant to the target space asset. The ViviSat Mission Extension Vehicle, also under development since the early 2010s, illustrate... | https://en.wikipedia.org/wiki?curid=22202480 |
Moscow State University of Fine Chemical Technologies named after M.V. Lomonosov (traditional abbreviation "MITHT") is one of the oldest universities in the country that offer training in a wide range of specialties in the field of chemical technology. Currently, there are more than 4,500 students in nine areas of unde... | https://en.wikipedia.org/wiki?curid=22208238 |
Moscow State University of Fine Chemical Technologies Guerrier. In 1905 as a director was elected S. A. Chaplygin, the leading scientist in the field of hydro- and aerodynamics, the organizer of the construction of school buildings on the Malaya Pirogovskaya street (formerly Devichie Pole). He remained in that post unt... | https://en.wikipedia.org/wiki?curid=22208238 |
Moscow State University of Fine Chemical Technologies During 1922 – 1928 years it has been published about 300 papers and 11 monographs. The greatest successes are achieved in the fields of organic and pharmaceutical chemistry under the direction of heads of departments, academics S. S. Nametkin, B. M. Rodionov, Profes... | https://en.wikipedia.org/wiki?curid=22208238 |
Moscow State University of Fine Chemical Technologies In MITHT the first time in the country began to train engineers on the technology of thin inorganic products, synthetic rubber, thin organic produce synthetic liquid fuels, organometallic compounds and a number of other specialties. In the process of restructuring o... | https://en.wikipedia.org/wiki?curid=22208238 |
Moscow State University of Fine Chemical Technologies And under the guidance of Professor G. A. Meyerson were carried out important work on carbothermy and getting super-hard alloys. 7 May 1940 for academic achievement and great progress in the preparation of chemists institute is named after the outstanding Russian sc... | https://en.wikipedia.org/wiki?curid=22208238 |
Moscow State University of Fine Chemical Technologies Employees of the institute published 450–500 scientific papers and received 50–60 invention certificates a year. The Institute conducts research on economic agreements and contracts on cooperation with industry and research institutes, whose number exceeded 150. MIT... | https://en.wikipedia.org/wiki?curid=22208238 |
Moscow State University of Fine Chemical Technologies Lomonosov has received a new, higher educational status – status of the Academy. With the name change has changed the status and range of activities of the institute along with old technology, new specialty Humanitarian – Management Profile: "Economics and Managemen... | https://en.wikipedia.org/wiki?curid=22208238 |
Moscow State University of Fine Chemical Technologies According to the Federal Agency for Supervision in Education and Science in 2008 in MITHT worked one of the most highly qualified scientific and technical teaching staff of universities and academies of Russia: doctors and candidates of sciences accounted for about ... | https://en.wikipedia.org/wiki?curid=22208238 |
Catabolite repression Carbon catabolite repression, or simply catabolite repression, is an important part of global control system of various bacteria and other micro-organisms. allows micro-organisms to adapt quickly to a preferred (rapidly metabolisable) carbon and energy source first. This is usually achieved throug... | https://en.wikipedia.org/wiki?curid=22215454 |
Catabolite repression In enteric bacteria one of the EIIA enzymes in their set is specific for glucose transport only. When glucose levels are high inside the bacteria, EIIA mostly exists in its unphosphorylated form. This leads to inhibition of adenylyl cyclase and lactose permease, therefore cAMP levels are low and l... | https://en.wikipedia.org/wiki?curid=22215454 |
Catabolite repression Gram positive bacteria such as "Bacillus subtilis" have a cAMP-independent catabolite repression mechanism controlled by catabolite control protein A (CcpA). In this alternative pathway CcpA negatively represses other sugar operons so they are off in the presence of glucose. It works by the fact t... | https://en.wikipedia.org/wiki?curid=22215454 |
Clarification and stabilization of wine In winemaking, clarification and stabilization are the processes by which insoluble matter suspended in the wine is removed before bottling. This matter may include dead yeast cells (lees), bacteria, tartrates, proteins, pectins, various tannins and other phenolic compounds, as w... | https://en.wikipedia.org/wiki?curid=22216378 |
Clarification and stabilization of wine Grapes contain natural pectolytic enzymes responsible for softening the grape berries during ripening, but these are not active under wine-making conditions (due to pH level, SO, and alcohol.) Therefore, fungal pectolytic enzymes are often added to white must to break up pectins,... | https://en.wikipedia.org/wiki?curid=22216378 |
Clarification and stabilization of wine The reduction of tannin can reduce astringency in red wines intended for early drinking. Many substances have historically been used as fining agents, including dried blood powder. Today, there are two general types of fining agents — organic compounds and solid/mineral materials... | https://en.wikipedia.org/wiki?curid=22216378 |
Clarification and stabilization of wine A study conducted by the University of California, Davis Department of Viticulture and Enology, however, found that no detectable amount of inorganic fining agents, and only trace quantities of proteinaceous agents, are left in the wine. There is the risk of valuable aromatic mol... | https://en.wikipedia.org/wiki?curid=22216378 |
Clarification and stabilization of wine The finest surface filtration, microfiltration, can sterilize the wine by trapping all yeast and, optionally, bacteria, and so is often done immediately prior to bottling. An absolute rated filter of 0.45 µm is generally considered to result in a microbially stable wine and is ac... | https://en.wikipedia.org/wiki?curid=22216378 |
Clarification and stabilization of wine Tartaric acid is the most prominent acid in wine with the majority of the concentration present as potassium bitartrate. During fermentation, these tartrates bind with the lees, pulp debris and precipitated tannins and pigments. While there is some variation according to grape va... | https://en.wikipedia.org/wiki?curid=22216378 |
Clarification and stabilization of wine In a wine intended to be still this is regarded as a serious fault; it can even cause the bottle to explode. Similarly, a wine that has not been put through complete malolactic fermentation may undergo it in bottle, reducing its acidity, generating carbon dioxide, and adding a di... | https://en.wikipedia.org/wiki?curid=22216378 |
Clarification and stabilization of wine The gradual oxidation that occurs during barrel aging also has a naturally stabilizing effect. Some producers prefer not to thoroughly clarify and stabilize their wines, believing that the processes involved may diminish a wine's aroma, flavor, texture, color or aging potential. ... | https://en.wikipedia.org/wiki?curid=22216378 |
Nucleic acid structure determination Experimental approaches of determining the structure of nucleic acids, such as RNA and DNA, can be largely classified into biophysical and biochemical methods. Biophysical methods use the fundamental physical properties of molecules for structure determination, including X-ray cryst... | https://en.wikipedia.org/wiki?curid=22217265 |
Nucleic acid structure determination Nucleic acids have a smaller percentage of hydrogen atoms, which are the atoms usually observed in NMR, and because nucleic acid double helices are stiff and roughly linear, they do not fold back on themselves to give "long-range" correlations. The types of NMR usually done with nuc... | https://en.wikipedia.org/wiki?curid=22217265 |
Nucleic acid structure determination NMR is also useful for probing the binding of nucleic acid molecules to other molecules, such as proteins or drugs, by seeing which resonances are shifted upon binding of the other molecule. Cryogenic electron microscopy (cryo-EM) is a technique that uses an electron beam to image s... | https://en.wikipedia.org/wiki?curid=22217265 |
Nucleic acid structure determination Cryo-EM is a newer, less perturbative version of transmission electron microscopy (TEM). It is less perturbative because the sample is not dried onto a surface, this drying process is often done in negative-stain TEM, and because Cryo-EM does not require contrast agent like heavy me... | https://en.wikipedia.org/wiki?curid=22217265 |
Nucleic acid structure determination base-pairing or accessibility. Differences in reactivity can therefore serve as a footprint of structure along the sequence. Different reagents react at different positions on the RNA structure, and have different spectra of reactivity. Recent advances allow the simultaneous study o... | https://en.wikipedia.org/wiki?curid=22217265 |
Nucleic acid structure determination hydroxyl radicals, would cleave the RNA molecule instead. The result in the truncated DNA is the same. Some reagents, e.g. DMS, sometimes do not block the reverse transcriptase, but trigger a mistake at the site in the DNA copy instead. These can be detected when using high-throughp... | https://en.wikipedia.org/wiki?curid=22217265 |
Nucleic acid structure determination In particular, DMS methylates N1 of adenine (A) and N3 of cytosine (C), both located at the site of natural hydrogen bonds upon base-pairing. Therefore, modification can only occur at A and C nucleobases that are single-stranded, base paired at the end of a helix, or in a base pair ... | https://en.wikipedia.org/wiki?curid=22217265 |
Nucleic acid structure determination DMS modification can also be used for DNA, for example in footprinting DNA-protein interactions. Selective 2′-hydroxyl acylation analyzed by primer extension, or SHAPE, takes advantage of reagents that preferentially modify the backbone of RNA in structurally flexible regions. Reage... | https://en.wikipedia.org/wiki?curid=22217265 |
Nucleic acid structure determination The carbodiimide moiety can also form covalent adducts at exposed nucleobases, which are uracil, and to a smaller extent guanine, upon nucleophilic attack by a deprotonated N. They react primarily with N3 of uracil and N1 of guanine modifying two sites responsible for hydrogen bondi... | https://en.wikipedia.org/wiki?curid=22217265 |
Nucleic acid structure determination Glyoxal, methylglyoxal, and phenylglyoxal, which all carry the key 1,2-dicarbonyl moiety, all react with free guanines similar to kethoxal, and can be used to probe unpaired guanine bases in structured RNA. Due to their chemical properties, these reagents can permeated readily into ... | https://en.wikipedia.org/wiki?curid=22217265 |
Nucleic acid structure determination This type of probing assay uses the structure dependent cleavage of RNA; single stranded regions are more flexible and unstable and will degrade over time. The process of in-line probing is often used to determine changes in structure due to ligand binding. Binding of a ligand can r... | https://en.wikipedia.org/wiki?curid=22217265 |
Nucleic acid structure determination The process of NAIM is to insert a single nucleotide analog into a unique site. This can be done by transcribing a short RNA using T7 RNA polymerase, then synthesizing a short oligonucleotide containing the analog in a specific position, then ligating them together on the DNA templa... | https://en.wikipedia.org/wiki?curid=22217265 |
Nucleic acid structure determination This process can be used to evaluate an entire area, where analogs are placed in site specific locations, differing by a single nucleotide, then when functional RNAs are isolated and run on a gel, all areas where bands are produced indicate non-essential nucleotides, but areas where... | https://en.wikipedia.org/wiki?curid=22217265 |
Robert H. Brill Dr Robert Brill is in the field of archaeological science, best known for his work on the chemical analysis of ancient glass. Born in the United States of America in 1929, Brill attended West Side High School in Newark, New Jersey, before going on to study for his B.S. degree at Upsala College, also New... | https://en.wikipedia.org/wiki?curid=22222088 |
Robert H. Brill Brill is a strong proponent of interdisciplinary cooperation as well as the collaboration between scientists across the world, and has served since 1982 on the International Commission on Glass. Within this he founded TC17, the technical committee for the Archaeometry of Glass, which lists among its aim... | https://en.wikipedia.org/wiki?curid=22222088 |
Robert H. Brill Focusing on Brill's achievements during the decades after he joined the Corning Museum in February 1960, it aims to highlight areas in which Brill pioneered new techniques and improved existing ones, offering summaries of major publications and proposing sources the interested reader may turn to for mor... | https://en.wikipedia.org/wiki?curid=22222088 |
Robert H. Brill Unfortunately, despite the examples of the method's successful applications provided by Brill, such as the almost accurate count of 156 layers on a bottle-base from the York River submerged in 1781 and excavated in 1935, the technique largely failed to convince and did not see widespread adoption (Brill... | https://en.wikipedia.org/wiki?curid=22222088 |
Robert H. Brill Furthermore, if leads were salvaged and mixed in ancient times, the isotope ratio will be compromised (Brill 1970). Aside from these two limitations, there is little else that could affect the lead isotope reading an object would yield. As such, Brill's method was greeted enthusiastically and he went on... | https://en.wikipedia.org/wiki?curid=22222088 |
Robert H. Brill By conducting the round robin experiment, Brill hoped the results gathered from different laboratories would help ‘correlate [...] earlier results’ and ‘calibrate future analyses in reference to one another’, as well as suggest which out of the analytical procedures used was the most accurate and effect... | https://en.wikipedia.org/wiki?curid=22222088 |
Robert H. Brill It should not be thought that Brill spent the entire decade ensconced in the Corning laboratory; he made various forays to the Middle East, including accompanying Wertime's 1968 survey of the ancient technologies of Iran, alongside other great minds such as the noted ceramicist, Frederick Matson (UCL In... | https://en.wikipedia.org/wiki?curid=22222088 |
Robert H. Brill Investigation of the manufacture technology required to produce the slab, suggested that in order to produce such a slab of glass, it would have been necessary to heat over eleven tons of batch material, and sustain it at around 1050˚C for between five and ten days (Brill 1967)! His initial interpretati... | https://en.wikipedia.org/wiki?curid=22222088 |
Robert H. Brill For Brill, the idea of this ‘dual nature of all glassmaking’ was ‘crystallized’ at Beth She’Arim, where only the raw glass production was represented, and would be reinforced later by the contrasting evidence, where working was favoured over production, found at Jalame, as discussed below (Brill, pers. ... | https://en.wikipedia.org/wiki?curid=22222088 |
Robert H. Brill 528 of the museum's objects were damaged, the library's rare books were ruined and paper index systems, data and catalogues were all lost (Martin and Edwards 1977). In the wake of this destruction, Brill was named Director, so that his time holding this position, from 1972-1975, would be spent overseein... | https://en.wikipedia.org/wiki?curid=22222088 |
Robert H. Brill Brill was to chair this committee until 2004 and received the W E S Turner Award from the International Commission of Glass on his departure, in recognition of his contribution as founder (Corning Museum of Glass 2009). One of the on-running projects of the Corning Museum of Glass published the excavati... | https://en.wikipedia.org/wiki?curid=22222088 |
Robert H. Brill Brill conducted an investigation of the furnace at Jalame, nicknamed the Red Room, in which there was a mysterious absence of glass finds of any kind (Brill 1988). Whilst work at Beth She’Arim had eventually found there to be five firing chambers responsible for heating the one tank, the fragmentary rem... | https://en.wikipedia.org/wiki?curid=22222088 |
Robert H. Brill Group I, however, was taken to be most indicative of the ship's origin; this group contained net sinkers, but also two ceramic glazes and three glass vessels, all sharing virtually identical lead ores with only one isotopic match, ‘an ore from Anguran, northwest of Tehran’ according to Barnes et al. (19... | https://en.wikipedia.org/wiki?curid=22222088 |
Robert H. Brill Brill also collaborated with Mckinnon to conduct chemical analyses of some glass samples from Sumatra, Indonesia, the results of which would be the ‘first data of their kind from this island’ (1987, 1). The results of the study, which also used samples from Java, another important location for the Silk ... | https://en.wikipedia.org/wiki?curid=22222088 |
Robert H. Brill The difficulties of analysing Chinese glasses were reflected later in the publication where, following the chemical investigation of 71 samples, Brill found that identifying the ‘basic formulation’, or ‘any of the primary batch materials’ of the glasses was still almost impossible (Brill et al. 1991). B... | https://en.wikipedia.org/wiki?curid=22222088 |
Robert H. Brill Further lead isotope analysis, this time on Chinese and central Asian pigments, was conducted with a larger team for the Getty's Conservation of Ancient Sites on the Silk Road, which saw Brill et al. launching studies that held incredible potential for understanding ‘chronological or stylistic differenc... | https://en.wikipedia.org/wiki?curid=22222088 |
Robert H. Brill His years of prolific publication, however, and his willingness to analyse glass from almost every situation have provided the archaeometry of glass with a bounty of reference material, as reflected by the "Chemical Analyses of Early Glasses". Despite his official retirement from the Corning Museum of G... | https://en.wikipedia.org/wiki?curid=22222088 |
TBST In molecular biology, (or TTBS) is a mixture of tris-buffered saline (TBS) and Polysorbate 20 (also known as Tween 20). It is a buffer used for washing nitrocellulose membrane in western blotting and microtiter plate wells in ELISA assays. The following is a sample recipe for TBST: Adjust pH with HCl to pH 7.4–7.6... | https://en.wikipedia.org/wiki?curid=22224112 |
Interferome is an online bioinformatics database of interferon-regulated genes (IRGs). These Interferon Regulated Genes are also known as Interferon Stimulated Genes (ISGs). The database contains information on type I (IFN alpha, beta), type II (IFN gamma) and type III (IFN lambda) regulated genes and is regularly upda... | https://en.wikipedia.org/wiki?curid=22228777 |
Hypoxic air technology for fire prevention Hypoxic air technology for fire prevention, also known as oxygen reduction system (ORS), is an active fire protection technique based on a permanent reduction of the oxygen concentration in the protected rooms. Unlike traditional fire suppression systems that usually extinguis... | https://en.wikipedia.org/wiki?curid=22239522 |
Hypoxic air technology for fire prevention Then, because of air infiltration, the oxygen concentration inside the protected volumes rises: when it exceeds a certain threshold, low-oxygen air is again injected to the protected volumes until the desired oxygen concentration is reached. Oxygen sensors are installed in the... | https://en.wikipedia.org/wiki?curid=22239522 |
Hypoxic air technology for fire prevention Air with low oxygen concentration is transported to the protected volumes through dedicated pipes or, more simply, via an existing ventilation system. In the latter case, dedicated pipes or ducts are not required. Hypoxic air fire prevention systems can also be used for purpos... | https://en.wikipedia.org/wiki?curid=22239522 |
Hypoxic air technology for fire prevention However, hypoxic air is considered by some to be safe to breathe for most people. Medical studies have been undertaken on this topic. Angerer and Novak’s conclusion is that “"working environments with low oxygen concentrations to a minimum of 13% and normal barometric pressure... | https://en.wikipedia.org/wiki?curid=22239522 |
Hypoxic air technology for fire prevention oxygen-reduced atmosphere are illustrated: Inspection body accreditation criteria are established according to ISO/IEC 17010 for third party verification of hypoxic air fire prevention system conformance to BSI PAS 95:2011 and VdS 3527en:2007 | https://en.wikipedia.org/wiki?curid=22239522 |
Selenium cycle The selenium cycle is a biological cycle of selenium similar to the cycles of carbon, nitrogen, and sulfur. Within the cycle, there are organisms which reduce the most oxidized form of the element and different organisms complete the cycle by oxidizing the reduced element to the initial state. In the sel... | https://en.wikipedia.org/wiki?curid=22241441 |
Selenium cycle Selenium can be removed from the ecosystem and bound in sediment through natural processes of chemical and microbial reduction of the selenate form to the selenite form. The reduction is followed by adsorption to clay, reaction with iron species, and coprecipitation or settling. After selenium is in the ... | https://en.wikipedia.org/wiki?curid=22241441 |
Photocatalytic water splitting is an artificial photosynthesis process with photocatalysis in a photoelectrochemical cell used for the dissociation of water into its constituent parts, hydrogen () and oxygen (), using either artificial or natural light. Theoretically, only light energy (photons), water, and a catalyst ... | https://en.wikipedia.org/wiki?curid=22242751 |
Photocatalytic water splitting Since the minimum band gap for successful water splitting at pH=0 is 1.23 eV, corresponding to light of 1008 nm, the electrochemical requirements can theoretically reach down into infrared light, albeit with negligible catalytic activity. These values are true only for a completely revers... | https://en.wikipedia.org/wiki?curid=22242751 |
Photocatalytic water splitting However, due to the relatively positive conduction band of , there is little driving force for production, so is typically used with a co-catalyst such as platinum (Pt) to increase the rate of production. It is routine to add co-catalysts to spur evolution in most photocatalysts due to th... | https://en.wikipedia.org/wiki?curid=22242751 |
Photocatalytic water splitting The conversion of solar energy to hydrogen by means of photocatalysis is one of the most interesting ways to achieve clean and renewable energy systems. However, if this process is assisted by photocatalysts suspended directly in water instead of using a photovoltaic and electrolytic syst... | https://en.wikipedia.org/wiki?curid=22242751 |
Photocatalytic water splitting The other important factor for a photocatalyst is the range of light absorbed; though UV-based photocatalysts will perform better per photon than visible light-based photocatalysts due to the higher photon energy, far more visible light reaches the Earth's surface than UV light. Thus, a l... | https://en.wikipedia.org/wiki?curid=22242751 |
Photocatalytic water splitting It was found that the crystallinity and energy band structure of the solid solutions depend on their Zn atomic concentration. The hydrogen production rate was found to increase gradually when the Zn concentration on photocatalysts increases from 0.2 to 0.3. Subsequent increase in the Zn f... | https://en.wikipedia.org/wiki?curid=22242751 |
Photocatalytic water splitting Temperatures up to 600 °C helped to reduce the number of defects, though temperatures above 700 °C destroyed the local structure around zinc atoms and was thus undesirable. The treatment ultimately reduced the amount of surface Zn and O defects, which normally function as recombination si... | https://en.wikipedia.org/wiki?curid=22242751 |
Photocatalytic water splitting 2% (highest for metal-oxide photo-electrode) with the advantage of a very simple and cheap catalyst. Tungsten diselenide may have a role in future hydrogen fuel production, as a recent discovery in 2015 by scientists in Switzerland revealed that the compound's own photocatalytic propertie... | https://en.wikipedia.org/wiki?curid=22242751 |
Comparison of nucleic acid simulation software This is a list of computer programs that are used for nucleic acids simulations. | https://en.wikipedia.org/wiki?curid=22253193 |
Pittcon Editors' Awards Pittcon Editors’ Awards honoured the best new products on show at the Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy, or Pittcon, for 20 years from 1996 having been established by Dr Gordon Wilkinson, managing editor of "Analytical Instrument Industry Report" (later "Inst... | https://en.wikipedia.org/wiki?curid=22255103 |
Pittcon Editors' Awards Editors were invited to attend a judging session towards the end of the trade show. They reviewed entries and voted on the nominated products. The only criterion was that products must have appeared at the exhibition for the first time, but winning products usually featured innovations in techno... | https://en.wikipedia.org/wiki?curid=22255103 |
Silver bromate (AgBrO), is a poisonous, light and heat-sensitive, white powder. | https://en.wikipedia.org/wiki?curid=22262277 |
Serine/arginine-rich splicing factor 1 (SRSF1) also known as alternative splicing factor 1 (ASF1), pre-mRNA-splicing factor SF2 (SF2) or ASF1/SF2 is a protein that in humans is encoded by the "SRSF1" gene. ASF/SF2 is an essential sequence specific splicing factor involved in pre-mRNA splicing. SRSF1 is the gene that co... | https://en.wikipedia.org/wiki?curid=22264033 |
Serine/arginine-rich splicing factor 1 ASF/SF2 also associates with the U2 snRNP. During the reaction, ASF/SF2 promotes the use of intron proximal sites and hinders the use of intron distal sites, affecting alternative splicing. Alternative splicing is affected by ASF/SF2 in a concentration-dependent manner; differing ... | https://en.wikipedia.org/wiki?curid=22264033 |
Serine/arginine-rich splicing factor 1 ASF/SF2 has the ability to be phosphorylated at the serines in its RS domain by the SR specific protein kinase, SRPK1. SRPK1 and ASF/SF2 form an unusually stable complex of apparent K of 50nM. SRPK1 selectively phosphorylates up to twelve serines in the RS domain of ASF/SF2 throug... | https://en.wikipedia.org/wiki?curid=22264033 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.